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SQL 格式化工具

在线格式化、美化和压缩 SQL 查询。支持 SELECT、INSERT、UPDATE、DELETE、JOIN、子查询等。

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免费在线 SQL 格式化工具

将杂乱的 SQL 查询格式化为清晰可读的代码。支持所有主要 SQL 语句，可配置缩进和关键字大写。

如何格式化 SQL

  1. 粘贴 SQL 查询
  2. 选择缩进样式
  3. 点击格式化或压缩
  4. 一键复制输出

常见问题

支持哪些 SQL 方言？
支持 MySQL、PostgreSQL、SQLite、SQL Server、Oracle 等标准 SQL 语法。
格式化会改变查询行为吗？
不会。SQL 格式化仅添加空白和换行，查询逻辑完全不变。
压缩按钮有什么用？
移除所有不必要的空白和换行，将 SQL 压缩成一行。
能格式化子查询吗？
可以。支持嵌套子查询、CTE（WITH 子句）和复杂 JOIN 条件。
我的 SQL 数据安全吗？
完全安全。所有格式化在浏览器中完成，数据不会发送到任何服务器。

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Additional FAQ

Why should I format my SQL?
Formatted SQL is easier to read, debug, and maintain. Well-formatted queries help you spot errors faster, improve code reviews, and are essential when sharing SQL with team members. This tool adds proper indentation and line breaks automatically.
Do different SQL dialects require different formatting?
While SQL syntax differs between MySQL, PostgreSQL, SQL Server, and Oracle, basic formatting principles (indentation, line breaks) are universal. This tool uses standard SQL formatting that works across all major dialects. Always test formatted queries in your specific database.
Can formatting help prevent SQL injection?
Formatting alone doesn't prevent SQL injection—it's purely visual. Always use parameterized queries and prepared statements to prevent injection attacks. See data validation tools for safety best practices.
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使用方法

  1. Paste your SQL query in the input field
  2. Click 'Format SQL' to beautify the query
  3. Keywords are capitalized and clauses are placed on separate lines
  4. Copy the formatted SQL for use in your project

常见用途

  • Formatting complex queries for code reviews
  • Beautifying auto-generated SQL
  • Preparing queries for documentation
  • Debugging SQL syntax issues

常见问题

What SQL dialects are supported?
This formatter supports standard SQL syntax that works with MySQL, PostgreSQL, SQLite, SQL Server, and most other databases.
Does formatting change query behavior?
No. SQL formatting only adds whitespace and line breaks. The query logic and results remain identical.
Can I format complex queries?
Yes. The tool handles SELECT, INSERT, UPDATE, DELETE, JOIN, subqueries, CTEs (WITH clauses), and other standard SQL constructs.